Why did the rulers of Moscow work with the Mongols?

i think this is it

Explanation:

When the Mongols invaded the lands of Kievan Rus' in the 13th century, Moscow was an insignificant trading outpost in the principality of Vladimir-Suzdal. Although the Mongols burnt down Moscow in the winter of 1238 and pillaged it in 1293, the outpost's remote, forested location offered some security from Mongol attacks and occupation, while a number of rivers provided access to the Baltic and Black Seas and to the Caucasus region.[10]

The Moscow Kremlin under Prince Ivan Kalita (early XIV century) by Apollinary Vasnetsov

More important to the development of the state of Moscow, however, was its rule by a series of princes who expanded its borders and turned a small principality in the Moscow River Basin into the largest state in Europe of the 16th century.[11] The first ruler of the principality of Moscow, Daniel I (d. 1303), was the youngest son of Alexander Nevsky of Vladimir-Suzdal. He started to expand his principality by seizing Kolomna and securing the bequest of Pereslavl-Zalessky to his family. Daniel's son Yuriy (also known as Georgiy; ruled 1303-1325) controlled the entire basin of the Moskva River and expanded westward by conquering Mozhaisk. He then allied with the overlord of the Rus' principalities, Uzbeg Khan of the Golden Horde, and married the khan's sister.

before there were tanks, machine guns, windmills, and solar panels, the first civilizations emerged that create the history of humanity which provided the larger context for western civilization. uses of weaponry and technology were used very differently in the ancient civilizations than they are today. relating back to the times of the ancient mesopotamian civilization, technology kept advancing throughout the ancient egyptian civilization into the ancient greek civilization, and then finally the ancient roman civilization. as techniques and strategies were past down from civilization to civilization, each shared its own similarities, as well as varied differences. one trait they had in common was to commit violence and economically overpower one another. technology has ultimately advanced due to the knowledge transferred from generation to generation. uses of sophisticated weaponry and devices have created more opportunity for warfare and improvement in the work place. ancient civilizations became more powerful due to the advancements of technology. technology did not only create the use of violence, but it also the economies grow and become stronger, because production of trading goods rose like never before. the rivers, such as the nile, tigris, and euphrates all flourished, as well as destructed civilizations. each civilization had different uses for these rivers, however, some benefited more than others. when analyzing ancient civilizations, there   are things you must understand

explanation:

by improved communication.